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1. WO1996003518 - PROCESS FOR DEMETHYLATING S-METHYL-MERCAPTO COMPOUNDS

Publication Number WO/1996/003518
Publication Date 08.02.1996
International Application No. PCT/EP1995/002883
International Filing Date 19.07.1995
Chapter 2 Demand Filed 23.01.1996
IPC
C12P 11/00 2006.01
CCHEMISTRY; METALLURGY
12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
PFERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
11Preparation of sulfur-containing organic compounds
C12P 13/04 2006.01
CCHEMISTRY; METALLURGY
12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
PFERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
13Preparation of nitrogen-containing organic compounds
04Alpha- or beta-amino acids
CPC
C12P 11/00
CCHEMISTRY; METALLURGY
12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
PFERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
11Preparation of sulfur-containing organic compounds
C12P 13/04
CCHEMISTRY; METALLURGY
12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
PFERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
13Preparation of nitrogen-containing organic compounds
04Alpha- or beta- amino acids
Applicants
  • QUEST INTERNATIONAL B.V. [NL]/[NL] (AllExceptUS)
  • HANSEN, Theo, Adriaan [NL]/[NL] (UsOnly)
  • JANSEN, Michael [NL]/[NL] (UsOnly)
  • VAN DER MAAREL, Marc, Jos, E., C. [NL]/[NL] (UsOnly)
Inventors
  • HANSEN, Theo, Adriaan
  • JANSEN, Michael
  • VAN DER MAAREL, Marc, Jos, E., C.
Priority Data
94202174.225.07.1994EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS FOR DEMETHYLATING S-METHYL-MERCAPTO COMPOUNDS
(FR) PROCEDE DE DEMETHYLATION DE COMPOSES DE S-METHYLE-MERCAPTO
Abstract
(EN)
The invention concerns a process for preparing mercapto compounds comprising the step of demethylating an S-methyl-mercapto compound of Formula (I) to the corresponding mercapto compound of Formula (II), using a microorganism which is capable of demethylating S-methyl-3-mercapto-propionate (MMPA) to 3-mercaptopropionate (MPA) or using an enzyme preparation derivable from such microorganism. Preferably the group R denotes CH2-CH2-COOH (I is MMPA), CH2-CH(NH2)-COOH (I is S-methyl-cystein), CH2-CH2-CH(NH2)-COOH (I is methionine) and CH2-COOH (I is methylmercapto-acetate) or a salt or ester of any of these. Preferably the microorganisms are methanogenic archaea of the genus $i(Methanosarcina) or obtained by inocculating a suitable medium containing MMPA with salt marsh or marine sediment followed by one or more transfers into fresh medium containing MMPA and suppression of the growth of $i(Bacteria), but not of $i(Archaea) in the culture e.g. with an antibiotic.
(FR)
L'invention concerne un procédé de préparation de composés de mercapto consistant à effectuer la déméthylation d'un composé de méthyle-mercapto de Formule (I) permettant d'obtenir le composé de mercapto correspondant de Formule (II) à l'aide d'un microorganisme pouvant effectuer la déméthylation de S-méthyle-3-mercapto-propionate (MMPA) en 3-mercaptopropionate (MPA) ou à l'aide d'une préparation d'enzyme obtenue à partir d'un tel microorganisme. Le groupe R représente de préférence CH2-CH2-COOH (I représente MMPA), CH2-CH(NH2)-COOH (I représente S-méthyle-cystéine), CH2-CH2-CH(NH2)-COOH (I représente méthionine) et CH2-COOH (I représente méthylmercapto-acétate) ou un sel ou un ester de ceux-ci. Les microorganismes sont de préférence constitués d'archae méthanogénique du genre $i(Methanosarcina) ou bien sont obtenus par inoculation d'un milieu approprié contenant du MMPA à l'aide d'un sédiment marin ou d'eau des salines suivi d'un ou de plusieurs transferts dans un milieu neuf contenant du MMPA, et de la suppression de la croissance des bactéries, mais non des $i(archaes) dans la culture, par exemple au moyen d'un antibiotique.
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